KR20200135374A - OLED display panel and display device - Google Patents

Abstract

The present invention relates to the field of display technology, and discloses an OLED display panel and a display device. Here, the OLED display panel includes a substrate, a plurality of light-emitting areas arranged in an array shape; and a photoresist structure positioned between the light-emitting areas, wherein the photoresist structure is between the light-emitting areas after light emitted from the light-emitting areas is reflected. It is configured to prevent ejection from the side of the provided substrate. The above-mentioned OLED display panel has a substrate side as a light emitting display side, a photoresist structure is installed between the light emitting areas, and the photoresist structure is the substrate side provided between the light emitting areas after light emitted from the light emitting areas is reflected. It can prevent it from being ejected from, prevent light leakage from the OLED display panel, and improve the display effect of the OLED display panel.

Description

OLED display panel and display device

[Cross-citation of related applications]

This application claims the priority of a Chinese patent application filed with the Chinese Intellectual Property Office on May 17, 2019, with application number 201920716235.9, "OLED display panel and display device" as the invention name, and the entire Chinese patent application The contents are incorporated into the application by reference and are made a part of this application.

The present invention relates to the field of display technology, and more particularly to OLED display panels and display devices.

Currently, most OLED display panels have a light leakage problem. For example, in an OLED display panel that adopts an RGBW pixel arrangement in a related design, between the R emitting region and the W emitting region, between the W emitting region and the B emitting region, between the B emitting region and G emitting region, and between the G emitting region and R emitting region There is a certain amount of light leakage between them, and a method of solving such a light leakage problem has always been a technical problem to be solved in the art.

An OLED display panel provided by an embodiment of the present invention,

Board;

A plurality of light emitting regions positioned on the substrate and arranged in an array shape; And

A photoresist structure installed on the substrate and provided between the light emitting regions

Including,

The photoresist structure is configured to prevent light emitted from the adjacent light-emitting areas from being reflected and emitted from the side of a substrate provided between the light-emitting areas.

Optionally, in the aforementioned OLED display panel provided by an embodiment of the present invention, each of the light emitting regions comprises a color film and a light emitting structure sequentially positioned on the substrate,

The photoresist structure includes a color resist positioned between color films in adjacent light-emitting areas, and the color resist is configured to absorb light emitted from the adjacent light-emitting areas.

Optionally, in the aforementioned OLED display panel provided by the embodiment of the present invention, the color film in the light emitting region adjacent to the color resist has different colors.

Optionally, in the aforementioned OLED display panel provided by the embodiment of the present invention, two adjacent light emitting areas are a first light emitting area and a second light emitting area, respectively, and the photoresist structure comprises the first light emitting area and the second light emitting area. 2 It includes a first color resist and a second color resist positioned between the light-emitting areas, the first color resist and the color film of the first light-emitting area have the same color, are manufactured on the same layer, and the second color resist And the color film of the second light emitting region have the same color and are formed on the same layer.

Optionally, in the aforementioned OLED display panel provided by the embodiment of the present invention, the first color resist and the second color resist are arranged in a lamination manner.

Optionally, in the aforementioned OLED display panel provided by an embodiment of the present invention, the first color resist is located between the second color resist and the color film of the second light emitting area, and the second color resist is It is positioned between the first color resist and the color film in the first emission area.

Optionally, in the aforementioned OLED display panel provided by an embodiment of the present invention, each of the light emitting regions further comprises a source-drain electrode layer positioned between the substrate and the color film, and the source-drain electrode layer is data Contains the line,

The data lines of the first light-emitting area and the second light-emitting area are parallel and adjacent to each other, and a boundary line between the first color resist and the second color resist is a distance between the data line of the first light-emitting area and the second light-emitting area. The distance to the data line in the emission area is the same.

Optionally, in the aforementioned OLED display panel provided by an embodiment of the present invention, each of the light emitting regions includes a source-drain electrode layer and a light emitting structure sequentially positioned on the substrate,

The photoresist structure includes a black light absorbing structure positioned between source-drain electrode layers in adjacent light emitting regions.

Optionally, in the aforementioned OLED display panel provided by an embodiment of the present invention, the source-drain electrode layer comprises a data line,

Two adjacent light-emitting areas are a third light-emitting area and a fourth light-emitting area, data lines of the third light-emitting area and the fourth light-emitting area are parallel and adjacent to each other, and the black light absorption structure is the third light-emitting area And a light absorbing unit positioned between the data line of and the data line of the fourth emission area.

Optionally, in the aforementioned OLED display panel provided by the embodiment of the present invention, the photoresist structure includes a pixel defining structure positioned between the light emitting regions, and the pixel defining structure is a light absorbing material.

Optionally, in the aforementioned OLED display panel provided by an embodiment of the present invention, each of the light emitting regions includes an anode, a light emitting layer and a cathode sequentially positioned on the substrate, and the cathode of the plurality of light emitting regions is Constituting the entire common electrode layer,

The photoresist structure includes a first opening positioned within the entire electrode layer, and the first opening is provided at a position opposite to a portion between adjacent light emitting regions.

Optionally, the OLED display panel further comprises a pixel defining structure positioned between the light emitting regions,

The photoresist structure further includes a second opening located within the pixel defining structure, and the projection of the second opening on the substrate covers the projection of the first opening on the substrate.

Optionally, each of the light-emitting regions further includes a source-drain electrode layer positioned between the substrate and the anode, and the source-drain electrode layer includes a data line,

Two adjacent emission areas are a fifth emission area and a sixth emission area, data lines of the fifth emission area and the sixth emission area are parallel and adjacent to each other, and between the fifth emission area and the sixth emission area The first opening is provided, and a width of the first opening is greater than a distance between the data line of the fifth emission area and the data line of the sixth emission area.

An embodiment of the present invention also provides a display device comprising any one of the aforementioned OLED display panels.

1 is a schematic diagram of a partial plan view of an OLED display panel provided by an embodiment of the present invention.
2 is a schematic diagram of a partial cross-sectional structure between two light emitting regions of a conventional OLED display panel.
3 is a schematic diagram of a partial cross-sectional structure of an OLED display panel provided by an embodiment of the present invention.
4 is a schematic diagram of a partial cross-sectional structure of an OLED display panel provided by another embodiment of the present invention.
5 is a schematic diagram of a partial cross-sectional structure of an OLED display panel provided by another embodiment of the present invention.
6 is a schematic diagram of a partial cross-sectional structure of an OLED display panel provided by another embodiment of the present invention.
7 is a schematic diagram of a partial cross-sectional structure of an OLED display panel provided by another embodiment of the present invention.
8 is a schematic diagram of a partial cross-sectional structure of an OLED display panel provided by another embodiment of the present invention.

The present invention will be described with reference to the accompanying drawings in order to more clearly show the objects, technical proposals and advantages of the present invention. It is obvious that the embodiments described herein are only some of the embodiments of the present invention, and not all embodiments. Other embodiments obtained without exerting creativity based on the present invention also belong to the protection scope of the present invention for those of ordinary skill.

As shown in Figs. 1, 3 to 8, an embodiment of the present invention is provided between a substrate 1 and an OLED display panel including a plurality of light emitting areas 2 arranged in an array shape, and a light emitting area 2 It provides a located photoresist structure. For example, the color resist 41 of FIGS. 3 and 4, the light absorbing part 42 of FIG. 5, the pixel defining structure 43 of FIG. 6, the first opening 44 and the second opening of FIGS. 7 and 8 (45) is installed. Specifically, the photoresist structure is configured to prevent the light emitted from the light emitting regions 2 from being reflected from the substrate 1 between the light emitting regions 2 after being reflected.

The above-described OLED display panel uses the substrate 1 side as the light emitting display side, and a photoresist structure is provided between the light emitting regions 2. The photoresist structure may prevent the light emitted from the light emitting region 2 from being reflected and then emitted from the substrate 1 between the light emitting regions 2. This prevents light leakage from the OLED display panel and improves the display effect of the OLED display panel.

Optionally, in a specific embodiment provided by the present invention, as shown in Figs. 3 to 8, each light emitting region 2 is a source-drain electrode layer (metal layer), a color film 31 and a white light OLED light emitting structure ( 32). The source-drain electrode layer (metal layer) may include a data line 33, a source-drain electrode and other structures, and the OLED light-emitting structure 32 is a cathode 323, a light-emitting layer (EL layer) 322, and an anode ( 321) may be included.

Conventionally, as illustrated in FIG. 2, taking two adjacent BG light emitting regions 2 as an example, the B light emitting region 2 includes a source-drain electrode layer, a white light OLED light emitting structure 32, and a blue color film 311 And, the G light-emitting region 2 includes a source-drain electrode layer, a white light OLED light-emitting structure 32 and a green film 312. Specifically, the light emitted from the light-emitting structure 32 of the B light-emitting region 2 is converted into blue light R1 through the blue color film 31. The blue light R1 is reflected from the source-drain electrode layer, easily enters between the two pixels of the BG, and is reflected on the substrate 1 by the cathode 323 layer to be emitted. Likewise, since the green light R2 emitted from the G emission region 2 is also easily reflected and emitted by the substrate 1 between the two pixels of the B-G, a light leakage problem occurs according to this situation.

Optionally, in a specific embodiment provided by the present invention, as shown in FIGS. 3 and 4, the photoresist structure comprises a color resist 41 located between the color films 31 of adjacent light emitting regions 2 can do. The color resist 41 is configured to absorb light emitted from the adjacent light-emitting region 2.

Illustratively, in the specific embodiment provided by the present invention, the color resist may be different from the color film in the adjacent light emitting region. When light emitted from the light-emitting region 2 is reflected between the light-emitting regions 2 adjacent to each other by the source-drain electrode layer, it passes through the color resist 41 and is absorbed by the color resist 41 to prevent light leakage.

Illustratively, in the specific embodiment provided herein, two adjacent light-emitting areas 2 are a first light-emitting area 21 and a second light-emitting area 22, respectively. The photoresist structure may include a first color resist 411 and a second color resist 412 positioned between the first light-emitting region 21 and the second light-emitting region 22. The color film 31 of the first color resist 411 and the first light-emitting area 21 has the same color and is produced on the same layer, and the color film of the second color resist 412 and the second light-emitting area 22 (31) has the same color and is made on the same layer.

Specifically, the first color resist 411 has the same color as the color film 31 of the first light-emitting area 21, and the second color resist 412 is the color film 31 of the second light-emitting area 22. ) And have the same color. Also, the light emitted from the first light-emitting region 21 is absorbed by the second color resist 412 when passing through the second color resist 412. The light emitted from the second light-emitting region 22 is absorbed when passing through the first color resist 411. Therefore, light emitted from the adjacent first and second light-emitting areas 21 and 22 is absorbed between the first and second light-emitting areas 21 and 22 (arrows in FIGS. A dotted line indicates no light transmission, that is, light is absorbed), preventing light leakage. Since the first color resist 411 and the second color resist 412 are fabricated on the same layer as the first light-emitting region 21 and the second light-emitting region 22, no additional process steps are required, and the fabrication process is very simple.

Optionally, in a specific embodiment provided by the present invention, as shown in Fig. 3, the first color resist 411 and the second color resist 412 may be arranged in a stack.

Optionally, in the specific embodiment provided by the present invention, as shown in Fig. 4, the first color resist 411 and the second color resist 412 may also be fabricated on the same layer. At this time, the first color resist 411 is located between the color film 31 and the second color resist 412 of the second light-emitting region 22, and the second color resist 412 is the first light-emitting region 21 It is located between the color film 31 and the first color resist 411 of. The light of the first light-emitting region 21 may be reflected by the source-drain electrode layer and then reach the adjacent second color resist 412 and be absorbed by the second color resist 412. The light of the second light-emitting region 22 may be reflected from the source-drain electrode layer and then reach the adjacent first color resist 411 and be absorbed by the first color resist 411. This arrangement not only prevents light leakage between adjacent pixels, but also prevents step differences caused by overlapping of the color resist layers between pixels, thereby ensuring uniformity of the color film process.

Specifically, in the specific embodiment provided by the present invention, the sizes of the first color resist 411 and the second color resist 412 may be substantially the same.

Illustratively, in a specific embodiment provided by the present invention, as shown in FIGS. 1 and 4, the first light-emitting area 21 and the second light-emitting area 22 are in the row direction (the gate line 34 is In the direction of extension). And the data lines 33 of the first light-emitting area 21 and the second light-emitting area 22 are arranged in parallel and adjacent to each other, for example, at this time, the first color resist 411 and the second color resist 412 May be located between the data line 33 of the first light-emitting area 21 and the data line 33 of the second light-emitting area 22 and cover the data line 33 and the color film 31 in adjacent pixels ) Can be connected. In addition, the distance d1 between the boundary line S between the first color resist 411 and the second color resist 412 and the data line 33 of the first light-emitting region 21 is the boundary line S and the second light emission. It is equal to the distance d2 between the data lines 33 in the area 22, i.e. d1 = d2.

Specifically, in a specific embodiment provided with the present invention, taking the OLED display panel of the present invention adopting the RGBW pixel arrangement as an example, as shown in Fig. 1, in this case, the first light emitting area 21 and the second light emitting area ( 22) may be an R emission region and a G emission region, or a G emission region and a B emission region.

Optionally, in a specific embodiment provided herein, the photoresist structure may include a black light absorbing structure positioned between the source-drain electrode layers of the adjacent light-emitting region 2. Specifically, when light emitted from the light emitting area is reflected toward the substrate between adjacent light emitting areas, it passes through the black light absorption structure and is absorbed to avoid light leakage.

Illustratively, in a specific embodiment provided by the present invention, as shown in Figs. 1 and 5, two adjacent light-emitting areas 2 are respectively a third light-emitting area 23 and a fourth light-emitting area 24. To do. The third light-emitting area 23 and the fourth light-emitting area 24 are adjacent in the row direction (the extension direction of the gate line 34), and the data lines of the third light-emitting area 23 and the fourth light-emitting area 24 (33) is parallel and adjacent?? The black light absorbing structure may include a light absorbing part 42 between the data line 33 of the third light emitting area 23 and the data line 33 of the fourth light emitting area 24. Specifically, the light emitted from the third light emitting area 23 is reflected by the data line 33 to reach the cathode 323, is reflected by the cathode 323, and then reaches the light absorbing unit 42, Can be absorbed. Likewise, the light emitted from the fourth light-emitting region 24 may be reflected by the cathode 323 and then reached and absorbed by the light absorbing portion 42. Accordingly, light emitted from the adjacent third and fourth light-emitting regions 23 and 24 is absorbed between the third and fourth light-emitting regions 23 and 24 to prevent light leakage.

Illustratively, in a specific embodiment provided with the present invention, taking the OLED display panel of the present invention employing an RGBW pixel arrangement as an example, as shown in Fig. 1, in this case, the third light emitting area 23 and the fourth light emitting area The region 24 may be an R emission region and a G emission region, a G emission region and a B emission region, and may also be a B emission region and a W emission region, or a W emission region and an R emission region.

Optionally, in a specific embodiment provided by the present invention, as shown in Fig. 6, the photoresist structure may include a pixel defining structure 43 positioned between the light emitting regions 2, and the pixel defining structure 43 is a light absorbing material and may be a black light absorbing material. Specifically, when the light emitted from the light-emitting region 2 reaches the pixel defining structure 43 through reflection of the source-drain electrode layer, it will be absorbed by the pixel defining structure 43, and thus toward the substrate 1 Light leakage can be avoided if it is not reflected (a dotted line with an arrow in Fig. 6 indicates no light transmission, that is, light is absorbed).

Illustratively, in a specific embodiment provided herein, the OLED display panel of the present invention adopts an RGBW pixel arrangement as an example as shown in FIG. 1. In this case, the photoresist structure may include the entire pixel defining layer, and between the R emission region and the G emission region, between the G emission region and the B emission region, between the B emission region and the W emission region, and between the W emission region and the R emission region. May contain some pixel definition structures. That is, the entire pixel defining structure may use a black light absorbing material, or a pixel defining structure between some pixels may be a black light absorbing material.

Optionally, in a specific embodiment provided by the present invention, as shown in Figs. 7 and 8, the light-emitting structure 32 of each light-emitting region 2 is an anode located sequentially on the substrate 1 ( 321), a light emitting layer 322, and may include a cathode 323. Further, the cathodes 323 of the plurality of light emitting regions 2 constitute the entire common electrode layer 323. For example, the photoresist structure may include a first opening 44 positioned throughout the electrode layer 323. The first opening 44 is provided at a position opposite to the portion between the adjacent light emitting regions 2, that is, at a position where the cathode 323 layer is transparent to the portion between the adjacent light emitting regions 2. Specifically, when light emitted from the light-emitting region 2 reaches the first opening 44 of the cathode 323 layer through reflection of the source-drain electrode layer, it is not reflected toward the substrate 1 and the first opening 44 ) Is directly emitted (dotted lines with arrows in Figs. 7 and 8 indicate no light transmission, that is, light is absorbed). Therefore, it is possible to prevent light from being emitted from the side of the substrate 1 and to avoid light leakage.

Illustratively, in a specific embodiment provided with the present invention, as shown in FIG. 8, the photoresist structure may further include a second opening 45 located on the pixel defining structure 43, and the substrate ( The projection of the second opening 45 in 1) covers the projection of the first opening 44 on the substrate 1. Specifically, the position of the second opening 45 corresponds to the position of the first opening 44, and the size of the second opening 45 may be greater than or equal to the first opening 44. The second opening 44 on the pixel defining structure 43 prevents light from being reflected toward the substrate 1 by the pixel defining structure 43, thereby better preventing light leakage.

Illustratively, in a specific embodiment provided by the present invention, each light emitting region 2 includes a source-drain electrode layer positioned between the substrate 1 and the anode 321, and the source-drain electrode layer is a data line ( 33). 7 and 8, two adjacent light-emitting areas 2 are a fifth light-emitting area 25 and a sixth light-emitting area 26, respectively. The fifth light-emitting area 25 and the sixth light-emitting area 26 are adjacent along the row direction (the direction in which the gate line 34 extends), and the data lines of the fifth light-emitting area 25 and the sixth light-emitting area 26 33 are parallel and adjacent. A first opening 44 is provided at a position opposite to the portion between the fifth light-emitting region 25 and the sixth light-emitting region 26. Since the width L1 of the first opening 44 is larger than the distance L2 between the data line 33 of the fifth light emitting area 25 and the data line 33 of the sixth light emitting area 26, Light leakage and light mixing between the 5 light-emitting area 25 and the sixth light-emitting area 26 can be prevented more efficiently.

Illustratively, in a specific embodiment provided with the present invention, taking the OLED display panel of the present invention adopting the RGBW pixel arrangement as an example, as shown in Fig. 1, in this case, the fifth light-emitting area 25 and the sixth light-emitting area The region 26 may be an R emission region and a G emission region, a G emission region and a B emission region, and may be a B emission region and a W emission region, or may be a W emission region and an R emission region.

Specifically, the OLED display panel of the present invention uses a substrate side as a display light emitting display side and is a back-emitting OLED, and illustratively, the OLED display panel may be an RGBW pixel array or an RGB pixel array. The OLED display panel may be a white light OLED + color film display type or a single color OLED display type (red light OLED + green light OLED + blue light OLED), and the shape of the OLED display panel is not limited to the present invention.

In addition, the photoresist structure of the embodiment provided by the present invention is the color resist 41 of FIGS. 3 and 4, the light absorbing part 42 of FIG. 5, the pixel defining structure 43 of FIG. 6, and the It may include one or more of the same structures as the first opening 44 and the second opening 45. In the embodiments of the present invention, the photoresist structure is merely described as an example, and not all embodiments of the present invention. In fact, any structure configured to prevent light emitted from the light emitting region from being reflected and then emitted from the substrate side between the light emitting regions falls within the scope of protection of the photoresist structure in the present invention.

Based on the same idea of the present invention, embodiments of the present invention provide a display device including any one of the aforementioned OLED display panels. The display device can be applied to any product or component having a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator. Since the principle of solving the problem of the display device is similar to that of the display panel described above, the implementation of the display device may refer to the implementation of the display panel described above, and the description will not be repeated here.

Those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if such modifications and variations of the present invention are within the scope of the claims and equivalents of the present invention, the present invention is also intended to cover such modifications and variations.

Claims (14)

Board;
A plurality of light emitting regions positioned on the substrate and arranged in an array shape; And
A photoresist structure installed on the substrate and provided between the light emitting regions
Including,
The photoresist structure is configured to prevent light emitted from the adjacent light-emitting areas from being reflected and then emitted from the side of a substrate provided between the light-emitting areas. The method of claim 1,
Each of the light emitting regions includes a color film and a light emitting structure sequentially positioned on the substrate,
Wherein the photoresist structure includes a color resist positioned between color films in adjacent light emitting areas, the color resist being configured to absorb light emitted from the adjacent light emitting areas. The method of claim 2,
OLED display panel, characterized in that the color film in the light emitting region adjacent to the color resist has different colors. The method of claim 2,
The two adjacent light-emitting areas are a first light-emitting area and a second light-emitting area, respectively, and the photoresist structure includes a first color resist and a second color resist positioned between the first light-emitting area and the second light-emitting area, The first color resist and the color film of the first light-emitting area have the same color and are produced on the same layer, and the second color resist and the color film of the second light-emitting area have the same color and are produced on the same layer OLED display panel, characterized in that. The method of claim 4,
The first color resist and the second color resist are arranged in a stacked manner. The method of claim 4,
The first color resist is positioned between the second color resist and the color film in the second light emitting area, and the second color resist is positioned between the first color resist and the color film in the first light emitting area. OLED display panel characterized by. The method of claim 6,
Each of the light-emitting regions further includes a source-drain electrode layer positioned between the substrate and the color film, and the source-drain electrode layer includes a data line,
The data lines of the first light-emitting area and the second light-emitting area are parallel and adjacent to each other, and a boundary line between the first color resist and the second color resist is a distance between the data line of the first light-emitting area and the second light-emitting area. OLED display panel, characterized in that the distance from the light emitting area to the data line is the same. The method of claim 1,
Each of the light emitting regions includes a source-drain electrode layer and a light emitting structure sequentially positioned on the substrate,
The photoresist structure includes a black light absorbing structure positioned between source-drain electrode layers in adjacent light emitting regions. The method of claim 8,
The source-drain electrode layer includes a data line,
Two adjacent light-emitting areas are a third light-emitting area and a fourth light-emitting area, data lines of the third light-emitting area and the fourth light-emitting area are parallel and adjacent to each other, and the black light absorption structure is the third light-emitting area And a light absorbing unit positioned between the data line of and the data line of the fourth light emitting area. The method of claim 1,
The photoresist structure includes a pixel defining structure positioned between the light emitting regions, and the pixel defining structure is a light absorbing material. The method of claim 1,
Each of the light-emitting regions includes an anode, a light-emitting layer, and a cathode sequentially positioned on the substrate, and the cathodes of the plurality of light-emitting regions constitute the entire common electrode layer,
The photoresist structure includes a first opening positioned within the entire electrode layer, and the first opening is provided at a position opposite to a portion between adjacent light emitting regions. The method of claim 11,
Further comprising a pixel defining structure located between the light emitting regions,
The photoresist structure further comprises a second opening located within the pixel defining structure, and the projection of the second opening on the substrate covers the projection of the first opening on the substrate. The method of claim 11 or 12,
Each of the light-emitting regions further includes a source-drain electrode layer positioned between the substrate and the anode, and the source-drain electrode layer includes a data line,
Two adjacent emission areas are a fifth emission area and a sixth emission area, data lines of the fifth emission area and the sixth emission area are parallel and adjacent to each other, and between the fifth emission area and the sixth emission area Wherein the first opening is provided, and a width of the first opening is greater than a distance between the data line of the fifth emission area and the data line of the sixth emission area. A display device comprising the OLED display panel according to any one of claims 1 to 13.

Images